Experience refers to firsthand, demonstrated involvement with the topic (has the author actually done the thing they're writing about). Expertise refers to relevant knowledge or credentials. Authoritativeness reflects the reputation of the site or author within their field. Trustworthiness covers accuracy, transparency, and safety — including clear authorship, sourcing, and business legitimacy signals like real contact information.
E-E-A-T isn't a single ranking factor Google scores directly — it's a rating framework used to calibrate search quality systems, and its signals (named authors with real credentials, cited sources, accurate and current content, transparent business information) are the same signals AI answer engines use to judge whether a source is safe to cite.